/*
 * Copyright 2020-2024 Typelevel
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cats.effect
package unsafe

class IOLocalsSpec extends BaseSpec {

  "IOLocals" should {
    "return a default value" in real {
      IOLocal(42)
        .flatMap(local => IO(local.unsafeThreadLocal().get()))
        .map(_ must beEqualTo(42))
    }

    "return a set value" in real {
      for {
        local <- IOLocal(42)
        threadLocal <- IO(local.unsafeThreadLocal())
        _ <- local.set(24)
        got <- IO(threadLocal.get())
      } yield got must beEqualTo(24)
    }

    "unsafely set" in real {
      IOLocal(42).flatMap(local =>
        IO(local.unsafeThreadLocal().set(24)) *> local.get.map(_ must beEqualTo(24)))
    }

    "unsafely reset" in real {
      for {
        local <- IOLocal(42)
        threadLocal <- IO(local.unsafeThreadLocal())
        _ <- local.set(24)
        _ <- IO(threadLocal.remove())
        got <- local.get
      } yield got must beEqualTo(42)
    }

  }

}
